Bit counting in the ABI chapter sometimes off by one

[th-hlrs]

Problem

In the ABI chapter the table heads number bits from 0 to 12 (=13 bits) but it should only be 12 bits in total according to the text. For instance Table 20.1

|Bits 12:9 (=4) | Bits 8:3 (=6) | Bits 2:0 (=3)|
|          0010 |         00000 |          000 |

seems to have to many bits in the head of the second column. Also the text mentions bits 8:3 and should probably be 7:3 etc.

Proposal

Correct table an text.

References and Pull Requests

[jeffhammond]

Thanks for catching this. I'll fix soon.